To compare postoperative pain intensity between two single-file systems with different kinetics (the OneShape file with continuous rotation vs.the WaveOne Gold file with reciprocation movement) after primary molar pulpectomy.Design: This superiority, parallel, randomized clinical trial included 164 healthy children aged 6 to 8 years with asymptomatic, necrotic, maxillary primary second molars due to caries. An equal number of children were assigned to the two groups. The teeth of children in Group 1 were instrumented with the OneShape rotary system (Micro-Mega), whereas teeth of children in Group 2 were instrumented with the WaveOne Gold reciprocating system (Dentsply Maillefer).Postoperative pain intensity was assessed using a 4-point pain scale at 6, 12, 24, 48 and 72 h and 1 week after treatment. The parent of each participant received 6 flashcards that included four faces and a word describing each face. A chi-square test was used to compare postoperative pain intensity. The level of significance was set to 5%.Results: Over the follow-up period, no significant difference in postoperative pain intensity was found between the two groups (p > .05). Although the absolute risk reduction maximum limit of 95% CI equal or exceeded the predetermined proportional difference of 0.15, pain intensity was inconclusive at 6, 24, and 48 hours denoting that the superiority of the OneShape single-file over the WaveOne Gold single-file could not be declared.
Conclusions:Postoperative pain intensity associated with a rotary vs. reciprocating file system was nearly similar.
Objectives
To compare oral health–related quality of Life (OHRQOL) of preschool children’s anterior teeth restored with prefabricated zirconia crowns (ZC) versus resin-bonded composite strip crown (RCSC).
Materials and methods
A prospective clinical trial included 136 children with early childhood caries aged 36–71 months who were assigned into prefabricated ZC and RCSC groups. A total of 344 teeth were restored either with 170 ZCs (49.4%) and 174 RCSCs (50.6%). Wilson and Cleary’s conceptual model was to associate the study predictors to the OHRQOL. Early Childhood Oral Health Impact Scale (ECOHIS) was used to assess the OHRQOL at 6 and 12 months. Mann–Whitney U test was used in comparing OHRQOL mean scores in the two groups and Wilcoxon signed-rank test with the effect size (r) to measure the intragroup OHRQOL change. A Poisson regression model was used to study potential risk factors associated with the overall OHRQOL.
Results
After 12 months, the USPHS parameters of the ZC were significantly superior compared to the RCSC. Overall ECOHIS mean scores in the ZC group were significantly lower than that of the RCSC group at T1 and T2 (p < 0.001). Remarkable enhancement of the OHRQOL at the follow-ups with a large effect size (r < 0.8) was observed. Restoration type, retention, baseline OHRQOL, and color had a significant impact on the overall OHRQOL at 12 months.
Conclusions
Preschool children OHRQOL treated with ZC were significantly better than those who received RCSC.
Clinical relevance
One of the optimum treatment standards in pediatric dentistry is the esthetic demand which has significance on the child’s OHRQOL and subsequently child’s general health quality of life. It is beneficial to the dentist to identify the influence of esthetic restorations on the OHRQOL of preschool children which aids in future decision-making. The longitudinal nature of the study enables the dentist to identify the changes of children’s OHRQOL.
To compare the postoperative pain of continuous rotation and reciprocating movements after pulpectomy of non‐vital primary molars and determine associated risk factors. 146 children aged 4–8 years with one primary molar indicated for pulpectomy were randomly assigned to two equal groups: those instrumented with continuous rotation motion (Hyflex EDM Coltene/Whaledent) and reciprocating motion (Reciproc R25 (VDW)). A 4‐point pain scale was used to assess postoperative pain frequencies, which were compared at different intervals using the Chi‐square test. Postoperative pain risk factors were determined using logistic regression analysis. There was no statistically significant difference between the follow‐ups. Gender, pulp status, and radiographic radiolucency increased the risk of postoperative pain incidence. Postoperative pain likelihood in children with chronic apical periodontitis was 8.72 times that of children with necrotic pulps. Postoperative pain after instrumentation with both kinematics was comparable. Postoperative pain incidence is increased by preoperative pulp condition, radiographic radiolucency, and gender.
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